Gl account block

.hi guru's

when i was using mateal revesal the gl account is blocked for particular materal for movemnt type 947 material AB. i seen the cofuguration in OMWB.The GL account setup for particular materila AB and same gl accountis bloked for posing.

now the issue same gl account is also set for Materila ZP but it got posted even though the GL accouant is bloked.how it can be possible?

thanks

regards

Sunitha